Tough one really.
If we assume that the rules of engagement are.
I am on my own,
It is close quarters (IE I dont get to see them coming from 400 Yards away)
The Weapons will be personal weapons.
I think one Man, alone, in close quarters would have a poor prospect even with modern personal weapons short of a machine gun.
As for Medieval ones o:0
Bear/gorillas.
Large, Powerful and very fast animals. Very hard to disable or kill!
You would only get one shot with a Bow (Any sort) and you would be unlikely to stop them with that so they would get you anyway
Again, with a sword, by the time they are close enough for you to use it, it would be too late.
I would look to some sort of Pike or lance to try fend them off and to inflict damage at a distance with a short sword if that fails.
But I wouldn't rate my chances.
Wolves.
a long weapon would be useless, While you are sticking one wolf, his mates would get you.
I would want to inflict damage close up, fast and hard. Mace and small shield (Which is also a weapon)
But a determined pack of wolves will get you in the end 100% of the time! (you would only have a realistic chance if you were able to back up against a cliff or a large tree)
As for modern personal weapons, short of a machine gun,
Large calibre handgun. Something like a 0.50cal Desert Eagle (Or maybe two, And a couple of spare clips. IIRC you only get 5 rounds/clip on the 0.50) for the Bear/Gorillas
For the Wolves, Whatever handgun has the largest number of rounds in the clip (Glock??) with a baseball bat as a backup (Hopefully the noise and casualties will scare them off, But again, if the wolves really want you, they will get you)